Maria, My neice was about your size (maybe slighter shorter), and age and had bulemia. She finally got professional help and was able to overcome it. It took quite a while for her to get professional help b/c she wouldn't even admit then that she had a problem. The bulemia kept her thin, but did not make her pretty at the time because it totally ruined her teeth. She has since had extensive dental work done and did not gain any weight. In fact, she's about 10 pounds lighter than she was when she was bulemic and she looks beautiful. She controls her weight through diet and exercise and hasn't been bulemic in well over 10 years, so I assure you, there is help. You just have to take that first step and get it. Good luck to you.
asugar